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29 * Copyright 2011 Develer S.r.l. (http://www.develer.com/)
33 * \defgroup dac Generic DAC driver
36 * \brief Digital to Analog Converter driver (DAC).
38 * <b>Configuration file</b>: cfg_dac.h
40 * \author Daniele Basile <asterix@develer.com>
42 * $WIZ$ module_name = "dac"
43 * $WIZ$ module_configuration = "bertos/cfg/cfg_dac.h"
44 * $WIZ$ module_supports = "sam3x"
51 #include <cfg/compiler.h>
52 #include <cfg/debug.h>
53 #include <cfg/macros.h>
57 #include CPU_HEADER(dac)
62 typedef int (*DacWriteFunc_t) (struct Dac *dac, unsigned channel, uint16_t sample);
63 typedef void (*SetChannelMaskFunc_t) (struct Dac *dac, uint32_t mask);
64 typedef void (*SetSamplingRate_t) (struct Dac *dac, uint32_t rate);
65 typedef void (*DmaConversionBufFunc_t) (struct Dac *dac, void *buf, size_t len);
66 typedef bool (*DmaConversionIsFinished_t) (struct Dac *dac);
67 typedef void (*DmaStartStreamingFunc_t) (struct Dac *dac, void *buf, size_t len, size_t slicelen);
68 typedef void (*DmaStopFunc_t) (struct Dac *dac);
70 typedef struct DacContext
73 SetChannelMaskFunc_t setCh;
74 SetSamplingRate_t setSampleRate;
75 DmaConversionBufFunc_t conversion;
76 DmaConversionIsFinished_t isFinished;
77 DmaStartStreamingFunc_t start;
88 struct DacHardware *hw;
91 INLINE int dac_write(Dac *dac, unsigned channel, uint16_t sample)
93 ASSERT(dac->ctx.write);
94 return dac->ctx.write(dac, channel, sample);
97 INLINE void dac_setChannelMask(struct Dac *dac, uint32_t mask)
99 ASSERT(dac->ctx.setCh);
100 dac->ctx.setCh(dac, mask);
103 INLINE void dac_setSamplingRate(Dac *dac, uint32_t rate)
105 ASSERT(dac->ctx.setSampleRate);
106 dac->ctx.setSampleRate(dac, rate);
110 * Convert \param len samples stored into \param buf.
112 INLINE void dac_dmaConversionBuffer(Dac *dac, void *buf, size_t len)
114 ASSERT(dac->ctx.conversion);
115 dac->ctx.conversion(dac, buf, len);
119 * Check if a dma transfer is finished.
121 * Useful for kernel-less applications.
123 INLINE bool dac_dmaIsFinished(Dac *dac)
125 ASSERT(dac->ctx.isFinished);
126 return dac->ctx.isFinished(dac);
130 * \param slicelen Must be a divisor of len, ie. len % slicelen == 0.
132 INLINE void dac_dmaStartStreaming(Dac *dac, void *buf, size_t len, size_t slicelen)
134 ASSERT(dac->ctx.start);
135 ASSERT(len % slicelen == 0);
136 dac->ctx.slicelen = slicelen;
137 dac->ctx.start(dac, buf, len, slicelen);
140 INLINE void dac_dmaStop(Dac *dac)
142 ASSERT(dac->ctx.stop);
146 #define dac_bits() DAC_BITS
148 void dac_init(Dac *dac);
150 /** \} */ //defgroup dac
151 #endif /* DRV_DAC_H */